| 序号 | 题目:10,11,12,13 | |
|---|---|---|
| 1 | ((13 + 10) + 12) − 11 | |
| 2 | ((13 + 12) − 11) + 10 | |
| 3 | ((12 + 10) + 13) − 11 | |
| 4 | ((13 + 12) + 10) − 11 | |
| 5 | (12 + (13 − 11)) + 10 | |
| 6 | (13 + 10) + (12 − 11) | |
| 7 | (13 + (12 − 11)) + 10 | |
| 8 | (13 + 12) − (11 − 10) | |
| 9 | (12 + 10) + (13 − 11) | |
| 10 | 13 + (12 − (11 − 10)) | |
| 11 | 13 + ((12 + 10) − 11) | |
| 12 | 12 + ((13 + 10) − 11) | |
| 13 | 12 + (13 − (11 − 10)) | |
| 14 | 12 + (10 + (13 − 11)) | |
| 15 | 13 + (10 + (12 − 11)) | |